The UFC’s August return to Indianapolis now likely has a full dance card thanks to the addition of a fight between a pair of UFC-debuting heavyweights.

Nandor Guelmino (11-4-1 MMA, 0-0 UFC) will meet Derrick Lewis (9-2 MMA, 0-0 UFC) at UFC on FOX Sports 1 2. Sources with knowledge of the fight booking confirmed the matchup to MMAjunkie.com (www.mmajunkie.com), though UFC officials have not yet made a formal announcement. That fight brings the card’s total up to 13 bouts.

UFC on FOX Sports 1 2 takes place Aug. 28 – a Wednesday – at Bankers Life Fieldhouse in Indianapolis. The main card will air on the FOX Sports 1 cable network and will be the second UFC card on the channel.

Guelmino made his North American debut in January when he met Josh Barnett at Strikeforce’s final show in Oklahoma City. Barnett stopped him just over two minutes into the fight with an arm-triangle choke. That loss snapped the Austrian’s seven-fight win streak, which included five stoppages in Europe.

Despite the loss to Barnett, which was Guelmino’s Strikeforce debut, he was brought into the UFC anyway with the merger of the two promotions. Of his 11 career wins, nine have come by stoppage.

Lewis will make his UFC debut on a six-fight unbeaten streak that includes five knockout wins and a no contest. In March, he stopped Ricky Shivers in the third round at Legacy FC 18 to follow up on a knockout of Jared Rosholt at Legacy FC 13.

Lewis hasn’t lost in nearly two years, a unanimous decision setback to Tony Johnson at Bellator 46 on June 25, 2011. The only other loss of his career coincidentally came on June 25, 2010 at the hands of current UFC heavyweight standout Shawn Jordan. So it stands to reason that if Lewis isn’t fighting on June 25, he’ll be fine with it.